Question about Equus 2004 Toyota Celica Obd2 Can Code Reader For Vehicles Built After 1996

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Toyota car toyota code 21

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Your post doesn't make much sense, but "code" problems with newer cars means you need to take it to a shop and have them run a computer diagnostic on it. Good luck.

Posted on Mar 29, 2014


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I had a code 26 so i replaced both 02 sensors on my 95 Toyota Camry and the same code keeps comming back

In that car I have code 26 listed as ""Air/fuel ratio rich". The oxygen sensors are listed as 21 or 27.

26 could indeed be caused by a failed oxygen sensor, but it is more likely to be a stuck cold start injector or a failed coolant temperature sensor.

Jul 06, 2017 | 1995 Toyota Camry

1 Answer


code 21 is

Open or short circuit in 2?position solenoid circuit for left front wheel

pop possible causes ABS actuator/SFLR or SFLH circuit

Oct 11, 2016 | 2001 Toyota Camry

2 Answers

I have a 1998 Toyota starlet and I have a abs light that wont go away !! fault code 21?? when I turn ignition on it clicks twice under bonnet kinda loud please help me ????

Your anti lock brake system is experiencing a problem. Don't ignore this. have a diagnostic test done at a garage or Toyota dealership to reveal what the test codes mean and what it will cost to fix.

Nov 16, 2015 | Toyota Cars & Trucks

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I have a 1992 Toyota pickup 4x4 4 cylinder. The computer set code 21 which is the oxygen sensor. I replaced the oxygen sensor and disconnected the battery to clear the code. I reconnected the battery...

The code shows oxy. Sensor , this means there is something tripping the sensor . Could be fuel delivery , catalyitic converter , or something else . .....

Jun 11, 2017 | 1992 Toyota Pickup

1 Answer

What is fault code 21 on a 1992 toyota xtra cab?

Generally speaking code 21 for Toyota is a problem with the O2 sensor circuit. It could be the sensor or the wiring back to the computer.

Oct 02, 2012 | 1992 Toyota Pickup

1 Answer

Toyota 92 code 21

Code 21 refers to the heater circuit of the O2 sensor.

Jun 24, 2011 | Toyota Camry Cars & Trucks

2 Answers

Fault code 21 and 42 on 98 toyota corolla,can u tell me what sensor it is?

21 Oxygen sensor voltage remained between .35 and .7V
continuously despite feedback correction
42 Vehicle speed sensor output doesn't reach the computer

Info From:

Sep 15, 2010 | 1998 Toyota Corolla

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Code 21 on toyota corolla 1993

Code 21 is an oxygen/heater sensor, replace the main o2 sensor and clear the code, or sometimes you can just clear the code and it wont come back. Problems with the o2 sensor are normal and usually not that big of a deal.

Mar 24, 2010 | 1993 Toyota Corolla

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1986 toyota cressida ran fine this morning untill i whent to the store made a sharp right hand turn and the car died it started right back up but runs extreamly ruff and most times wont stay running....

If you know what the codes are referring to , you then go to the parts and check them out. Obviously you have an ignition coil issue - replace the coil for one thing.

Sep 07, 2017 | 1986 Toyota Cressida

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